In Top Down integration, how are database tables created in Appian?

In Top Down integration within Appian, database tables are created directly using Appian Custom Data Types. This approach allows users to define the structure of their data models within the Appian environment, utilizing the built-in data types and relationships that Appian supports. By leveraging Custom Data Types, developers can easily map the required fields, set data types, and configure relationships between different entities, which Appian then translates into the corresponding database tables.

This method emphasizes an agile development process, where the database schema can evolve swiftly with changes in business logic or application requirements, without the need for external SQL scripts or files. Additionally, it reduces dependency on manual database management and enhances maintainability, as all changes are handled through the Appian interface, ensuring consistency and alignment with the application logic.

The other options, while they can be relevant in different contexts or systems, do not align with the Appian methodology for database creation in the context of Top Down integration. For instance, SQL scripts imply a more bottom-up approach, while importing existing files and using third-party applications suggest external data management rather than leveraging Appian's native capabilities.